ref: c7b8a9f86b3e6aecc69448a6aa724938a57c9de2 dir: /lib/c/stdio/putc.c/
#include <stdio.h> #undef putc int putc(int ch, FILE *fp) { return (fp->wp >= fp->rp) ? __putc(ch,fp) : (*fp->wp++ = ch); }